Finding good audio transcription agencies can be oddly tricky these days.
Because voice recognition technology has been constantly being developed, some cheap services abuse software to do the bulk of the job, but fail to deliver the final 10% of quality that only a human with trained ears can.
The need for quality makes the difference where the audio transcription involves legal matters, because the consequences can be life-changing for the individuals involved. Think about a court hearing, a deposition, phone calls, wire taps, briefings, affidavits, and so on. Accuracy is a must, because these activities comprise a lot of responsibility. And sound quality usually confuses the software, due to background noise, recordings that are not ideal, and so on. This is why a human is fundamental in ensuring quality control.
Media companies also need quality services to produce accurate closed captions. Automated systems usually have issues with the speed in which a person may speak, or the wide variety of accents featured in a single TV show, and so on.
This are some reasons why automated transcription always fails and cheap services should not be trusted. Find yourself a quality service provider.